Ductor-roll mechanism



W. M. KELLY DUCTOR ROLL MECHANISM Jan. 29, 1929. 1,700,680

Filed April 14, 1925 2 Sheets-Sheet 1 1% 1. O o o Jan. '29, 1929.

W. M. KELLY DUCTOR ROLL MECHANISM Filed April 14, 1923' 2 Sheets-Sheet 2 1 permitted independent bodily relative to said oscillating means. The yield-.

Patented Jan. 29, 1929.

WILLIAM M. KELLY, OF WESTFIELD, NEW JERSEY, ASSIGNOR 'lQ AMERTGAN TYPE 'rounnnns COMPANY, or JERSEY CITY, NEW JERSEY, A CORPORATION on NEW JERSEY.

DUCTOR-ROLL ivinonnnrsin Application filed April 14, 1923. Serial No. 632,078.

The present invention relates to printing presses, and particularly to the inking mechanism thereof' Oneof the objects of this invention is to efiect automatically an even coaction between the ductor rolland the fountain and transfer rolls even if their aXes are not quite parallel. This object, is carried out, according to the present invention, by providing a yielding connection between the ductor roll and its oscillating means, whereby the ductor roll is movements able mounting of the ductor roll permits each element of its cylindrical surface to contact the corresponding elements i of the fountain rolland transfer roll,so that the ink is evenly distributed on the ductor roll by the fountain roll and is, is turn, evenly distributed over the transfer roll by the ductor roll. The ultimate effect is a perfectly eveninking of the form'bed.

Another object of the present invention is to provide means to stop the feeding of the ink to the rolls .under certain conditions, as when no sheets are being fedto the impression cylinder. This object is attained, in the embodiment of the invention illustrated herei in, by the provision of a stop governed by the I so sheet detector, and operable into a position where it prevents the ductor roll from contacting with the fountain roll, whereby the feeding of the ink isdiscontinued when said stop is moved to operative position upon fail- 1 ure to feed a sheet. Thus an excessive accumuvented.

Other objects and features of novelty will be apparent from the description taken in connection with the drawings, in which: Y Figure 1 is a side elevation of the feeder end of a printing press, showing the-press inking mechanism and parts of a'sheet feeding. device;

Figure shown in side;

Figure'3 ly in section, transfer rolls,

2 is a view of the inking mechanism Figure 1', looking from the opposite showing one construction for mounting and controlling the ductor roll in accordance with the present invention; and

J1, Y '7 Figure 4 1s aaiagmentary plan view of jectin'g from is an enlarged side elevation, partof the fountain, ductor and" parts shown inFigure 3, the fountain and transferi'oll's being omitted TheQpresent invention relates. only to the mOlllltlIlgitIld control of-the ductor roll. It

is independent of any particular construction of press, inking mechanism or sheetfeedlng devices. Hence thepress andparts mentloned may be referred to only in a general way.

linder type. Theconstruction of the inking The press llll1Sl3I&tBCl is'of the bed-aIid-cyvmechanism, withthe exception of the mount ing of the ductor roll, is the same as that described in my copending application, Serial 7 i No. 490,290, filed August 6, 1921, now Patent No. 1,651,774. Said mechanism comprises an ink fountain 1, a fountain r0112, a ductor roll 3, a transferroll 4, vibrating mus- 5 and ,form rolls 6. The fountain roll" is rotated step by step by the ratchet mechanism shown in Figure 2. The ductor roll is supported by a shaft 7 which is oscillated by means of a" I cam8, lever 8*, link S and arm8 'securedto shaft 7, shown inFigure 2, as inmy copend- .ing application. v y p y I The ductor roll 3 is supported on shaft 'Zby means of the following construction. Rotatably mounted on shaft 7 "near each end there of is an arm 9 having in the free end thereof an upwardly opening slotwhi'ch receives a" journal 10 of the ductor roll. The journals are locked in said slots" byineans of latches 11 pivoted on, arms 9. Springs 12 attached l V to the tails of said latchesand to pins p-rothe hubs of arms 9 tend to hold v9O said latches injlocking position, which is the position illustrated in Figure 8i Fixed on shaft 7 adjacent to and inside each armf9 is a member 13 which has a pair of spaced pro jections 14. Each arm 9 has a lug 15 project ing from the" outer face thereof betweenthe projections 14. Mounted in an aperture of g each lug 151s a pin 16 whichprojectson eacliside of the lug, and coil springs 17 surround the projecting ends of the pin andbear v at their ends against'the lug 15' and proj ec-;

tions 14, respectively. This construction provides a yleldlng connection between the duotor roll and operating shaft7, at each end V of the roll. As the yielding connections are e independent of eachother the roll may, if

necessary, be movedmore atone end than the other to effect contact throughout the coact ing elements of the ductor roll and the fountain roll, on the one hand, and of the ductor I roll and transfer roll 4, on the other hand,

s or other causes.

it being understood that the throw of shaft '7 is slightly. more than necessary to efiect mere contact of the ductor roll with the coacts ing rolls, that is, the ductor roll is yieldingly pressed into contact'with said coacting rolls,

' whereby a perfect contact is obtained irrespective of any lack of parallelism of the coacting elements due to wearof the bearings The second namedobject of the invention is carried out by thefollowing construction.

A shaft 18', beneath and parallelto the fountain roll, is j ournaled at each end in a bracket 19 secured to the frame of the press. This shaft has fixed thereto a pair of fingers20 which are located in the planes of the arms 9 and which are adapted to be moved into and out of the path of said arms, to control the throw of the ductor roll towards the fountain roll. Means for rotating shaft 18 under the control of'the sheet detector is provided whereby said shaft may be rotated to throw the fingers 20 into abutting relation to the arms 9 and so stop the ductor roll short of the fountain roll, upon failure of the sheet feeding mechanism to feed a. properly registeredsheet and which will move said fingers out of the path of said arms when sheets are again fed to the impression cylinder. The

connection illustrated consists of an arm 21 fixed to an end of shaft 18 and a link 22 connecting'said arm to a bell crank 23 which is fulcrumed on the frame of the feeder adj acent a link 24: which is operated downwardly when no sheet is fed to the impression cylinder or when a sheet is fed out of register or in aecrumpled condition. The sheet detector mechanism partly illustrated is fully shown and described in my Patent 1,469,515, granted October 2, 1923, and reference may be hadthereto, if desired, for a fuller under- #standing of the construction and operation ofsaid mechanism. 'It is to be understood, however, that the present invention is not limited to any particular sheet detector. From the construction described, it will be understood that when no sheets are being fed or "when a sheet is out of register shaft 18 will be rotated in a counter-clockwise direction,'looking at Figure '3, and the fingers 20 moved into-the position shown in said figure. In this position the ends of the fingers will vabut surfaces 25 formed on arms 9 when the ductor roll is moved towards the fountain roll'and will prevent the ductor-roll from contacting with, and receiving ink from, the

fountain roll.

Although an embodiment of the invention has been described in detail, it is to be understood that the invention is not thus limited,

but includes modifications and changes that come within the scope of the appended claims. Having thus described the invention what is claimed as newand desired to be secured by Letters Patent is i 1. In inking mechanism for printing resses a ductor roll a shaft 'ournalled ary allel tosaid roll, arms rotatable on said shaft, said ductor roll being supported by said arms, yielding connections between saidarms and shaft, means for oscillating said shaft, and a stop normally in inactive position movable into the path of movement of one of said arms to thereby hold the roll from movement.

2. In inking mechanism" for printing presses, a fountain roll, a ductor roll, means to oscillate said ductor roll to convey ink from said frountain roll, said meaQnsincl'uding a yielding connection permitting relative bodily movementsof said ductor roll with re spect to said means, a sheet detector device and a stop connected thereto and pivoted to swing under its influence'intoa positionbelow the point of contact of said rolls,to thereby prevent said ductor roll from receiving inkfrom said fountain roll. 3. In inking mechanism. for printing presses, a ductor roll, a shaft journalled parailel to saidroll, armsrotatable on said shaft, said ductor roll being supported by said arms, yielding connectionsjbetween said'arms and shaft, means for oscillating said shaft, a sheet detector device, and a stop normally in'in active position connected to said sheet detector mechanism and movable thereby into the path of one of said arms. 7 p

4. In inking mechanism for printing presses, a ductor roll, a support for said roll,

means for oscillating said support, a yielding connection between said support and osoil lating means, and a stop normally in inactive position movable into the path of movement of said support to thereby limit the throw of said roll. V I 5. A. ductor roll mounting, for printing f presses, comprising in combination, an ink fountain, a fountain roll, a rock shaft mounta ed in front of and below said fountain roll, a pair of arms freely mounted on said shaft and having bifurcated ends, a ductor roll having. 1

mitting the stop means to prevent the motion of the free arms without interfering with the continuous operation of said oscillating means. '6. A ductor roll mounting for printing presses, comprising in combination, an ink fountain, a fountain roll, a rock shaft mounted .in front of and below said fountain roll, a pair of arms freely mounted on said shaft, a ductor roll having its shaft 'journaled in said arms, a member fixed to said shaft and having spaced ahutments, a lug on one of said free arms yieldingly held between said abutments, a transfer roll, and means for oscillating said shaft to swing said ductor roll from contact with said fountain roll to contact with said transfer roll, a sheet detector device, position connected to said sheet detector mechanism and movable thereby into the path of one of said arms, to thereby limit the throw of said ductor roll, and prevent its contact with the fountain roll.

In testimony whereof I hereunto afiix my signature. v p 7 WILLIAM M. KELLY.

and a stop normally in inoperative V i 

